Evaporator.



mssmoao. 7 PATENTED.PEB.25,1908.

P. G. KAISER.-

EVAPORATOR.

Arrnwnxon mum RAB. 1a, 1907.

. s BEEETS-SHBET 1.. if

No. 880,080. PATENTED FEB. 25, 1900. P. 0. KAISER.

EVAPORATOR.

APPLIOATIOE rum) [A116, 1007.

3 SHEETSSHEET 2.

(V j naw/Z2256] 7? 0 M 7M6 hen 01 PATENTED FEB. 25, 1908.

P. G. KAISER.

EVAPORATOR.

APPLICATION FILED MAR.16, 1907.

s SHEETS-.SHEET s.

lAUL GUST 1U. KAISER OF CHIOAGG, ILLINOIS.

An llCahlOi! filed March lih 19 07.

Specification of Letters L 'h all whom it Be it liIi 'iWIt t flus'rm' ll a citizen oi the linited States and it re. dent of Chicago, in the county 5 of :lllinois, have invented certain new and useful improvements in lCvm ior-zitors; and i. do hereby declare that theiollowing is full clear, and exact description thereof, reference being had to the ecconipu drmvir and to the letters of reference nltillifikl thereon, which forni a part of thi specification.

'lhis invention relates to an improved vacuum pan and more particularly to means for transmitting heat to the contents of the SLlIlO, the object being to promote circulation of the fluid in suchvecuuni pen. or evaporator and thus increase the e'fliciency oi' the device.

The invention consists in the matters hereinafter se-t'lorth an d more purtic ulerl y pointed out in the appended claims.

My invention may as better understood by reference to the accompanying. drmvings, in which,

Figure l is :1 view partly in and elevation and partly i section oi vacuum pen. ein bodying my invention. Fig". is a longitudinal elevation, 'ilh parts broken awry, on the section line of Fig. i. Fig. 3 e. horizontal section taken on line 3 3 of Fi 1. Fig. 4 is a. detail view showing in loi 'itnoinnl elevation one oi the pairs of plates represcnicd in Fig.5. 3. Fi 5 is it detail section, token on line 5-5 ol' lig'. 2* Fig. ll :1. detail section through one ol the end wells of the \aciuni pan showing the means for securing the tubes therein.

As shown in said drew-wings, A indicates, as

it whole, the body or shell of the evaporator or vacuum pen which is of rectangular form, as seen in plain view, and is provided with supporting illi'll llifii fi (t which upon 'llXCi'l E-bemns A. 'lhc body or shell is closed at its top by a, top well i and at bottoni by 21- bot'torn well A, eneh semired to the shell A by rivets or other-W' 'lhe interior of the shell A comprises a, lower compartment i),

oolr. and State ere I tnchz bl scour-m (-uhir heads or ends o'l each oi the tnnnblesj Patented 3.908.

' ends of the to hes l! are mounted in holes in the end Walls of the shell A and are secured i said en d Walls o means of thin'ibles t3 littin, the ends of the tubes ll end -tl'1reeded geinent with the The said end walls of the pen are provided with external, rectaneuler chmnbers or SiGnIinGhGSilS A and the outer walls of \vh ch consi. oi plates (1 de- 1 hereto.

having sci end walls.

l t Through the cirare openings :rllording communication between the interior oi the stenn1-c-l1ests A and A and the tubes i l. "The inner annular edge of each oi said l'lllIIllJl8Sf bears against it pi. hing; ring y which encircles the tube F and is clamped between said thiinble and a re. holly inwardly facing flange formed in the opening through the 'lwall A Each tube l 1. length slightly less than the distance between the inner surfaces of the circulz'ir liOs'tils oi ihc two lhiinolcs covering its ends, this wnstruction permitting; the tube to expand by heart and increase its length.

C indicates an inlet pipe leading from at source of steam suppl and communicating with the stemrechest A and C" indicates on exit or discharge ripe connected with the steinn chest A". tlteznn delivered to the stennechest A? enters and fills the pipes F F and the liquid surrounding said tubes will absorb the heat. Said tubes are, moreover, arranged in groups SGPEEIitlTGd by vertically exteni'l in said verti cclly extendi ve "cally arranged, i Mites Said plates form passages through "h. thr liquid immediately surrounding the tubesoi each group has upward movement, and other passages between the groups of tuhes for downwardly l'lowii'ig iizurrents of liquid. As shown in the ecconip drawings, each group consists of ph. ntv of tubes located in a single, vertical row, orwith their central exes in the s am e v crti cl pl arranged in pairs, the two plates constitutin each )fill beine' soaced a. sinelldistence a o l ,ptezl to engage with the tubes The plates F F ere ie pistes F by means of the die id. in the spaces immediately ascends through said spaces.

between the two plates in each and denser liquid displaced by the ascending? In order to facilitate the circulation of the liquid, the lower edges of the plates F .are extended below the lowermost of theliquid.

tubes F.

Connected with the top plate A of the pan is a passage or conduit a through which the vapors and gases are permitted to' escape. Such. passage leads to a condenser by the operatlon of which the gases escaping from the apparatus are Condensed and removed and a partial vacuum maintained iii the vacuum pan. Near the bottom of the vacuum pan and preferably at a point slightly below the lowermost tubes.F F is an inlet a, through which water may be admitted to the interior of the an A whenever it becomes necessary to was out and clean 3 the interior of the pan.

D indicates a valved inlet pipe communigcating with the lower compartment D 5 through which pipe the material to be treated is delivered to said compartrnentrD. In practice it has been found that this inlet 1pc D may be conveniently 1 et inasmuch as, during t e treatment of spent lye or other material, salt or other solids are precipitated in the lower compartment D. It is desirable to drain off such liquid as remains on the top of the precipitated salt and the pipe I) affords a con.- venient outlet for such liquid. Furthermore, said pipe D is shown as branched, each branch being provided with a valve and the said branches entering the compartment- D at difi'erent levels. The purpose of this construction is to permit the li uid tobe drawn from di'tl'erent levels accor ing to the amount of salt which may be present The' precipitated salt is taken from said compartment D through a man-hole provided with a removable cover I). The compartment E is likewise provided with two man-holes through which an operator may enter the pan for the urpose of cleaning the interior thereof, said man-holes having removable covers D D.

D indicates a valved pi ie or conduit connected with the bottom wall A of the-vacuum pan, whereby the washout water brought into the pan A through the conduit a may be drained oil" and inay pass to a sewer or elsewhere. Y

C designates a steam pipe connected with the mainsteam supply ip e C and opening into the com artment l Said steam pipe C is provider with a valve 0. The purpose of this 'pipc connection is as follows: In

used as an outevaporating pans it is always necessary to create 'a substantial vacuum. in said pan in order to lower the boiling point of the ma terial toibe treated. After the pan has been washed out by allowing water to enter through the conduit a as hereinbefore referred to,"this vacuum must be again created. For this purpose the valve 0 1s opened and gases produced by the evaporation of the contents thereof are condensed and removed by a vacuum purn ,or condenser and a substantial vacuum t lereby maintained in the pan. At the end of the evaporating opera tion, air is admitted to the apparatus and the vacuum therein destroyed by means'of a valve a This is necessary in order to pen rnit the man-hole cover D to be opened for, when a partial vacuum -exists in the apparatus, saic cover is held tightly upon its/p ca by the atmospheric pressure upon the outer surface of said cover.

To more fully describe the o erationjof the apparatus, let it be assumed t lat the pan has been washed out by the inflow of water at the conduit 0, This Water is allowed to ass out throiwh the outlet pipe D, as bctore stated. The valves controllin the ipes a D} D and the air tight doors and T) are tlien'closed. The valve C is opened and steam allowed to enter the pan and by the effect of its condensation a partial vacuum is produced inthe pan, as above described. The material to be treated is then allowed to enter the COM] art-merit D, under pressure it necessary, filing said compartment and rising through the s aces between 1 the tubes F until the level 0 the liquid or material reaches about sir; inches above the highest of the tubes F, or higher if desired.

Steam then being admitted to the steam compartment, the liqpid'in contact with the outer Walls of the tu es F is brought to the boiling point by the transmission therethrough of heat from the steam and said liquid being of less density than the liquidbetween the 'dividing plates F F rises, while the liquid between said lates descends. In this manner a continued circulation of the liquid takes place, the heated liquid rising throu h the spaces between the tubes and the dlviding plates, and the cooler liquid descending through the spaces between the plates F. The liquid in assing out hf the ower parts of the spaces )etween the plates F F min les with the liquid in the com partment and serves to heat the contents sion of lower cones of the plates? below 5 the the lowest tubs i".;n It is to be. noted. natas the liquid will descend spaces with 1 to soi the liquid below and bring tho -iquid the bottom of the compartzncnt D in contact with the circulating liquid. lhc liqui saia octsd to this treatment for i pcriod oi time necessary to properly pro .u'mic tho contained salts, and allow tll vapors, etc. "to pass oil into the vondcnscr and until the liquid is of a re,- quirod d. isiiy. The Valve- (If then opened allowin to orator the apparatus and dcstroy vacuum therein after which tho through it Will so anon-hole coyor D is opened and the salts rcinovcd and, necessary, the pan flushed out. it will be understood 'from the foregoing that while my improved device is adapted for the evaporation or"; liquids containing salts or other solids in solution, and the re :5 oovory of said solids, it is socially well adapted for partiai or complete evaporation of liquids not containing solids in solution, and my invention covers an apparatus for partially or completely evaporating liquids of all kinds whcthor they contain solids in solution or not.

i claim as'n'iy invention 1: CIHIhLjlllt-ilfil, in an i-zvaporating did he "2;: means located near thc and dcsig'ncd to he suhguid in said roccptaclc, comof groups of hcating liuhcs ntslly hcl wccn two opposvan and supportcd at tlicir ,aaid groups hciugscparalcd spaces, and a pluralily of upplatcs locai'od in said s 'xaccs" and ail'ordh z, for upwardly dopingcurrcnls of liruids ."ctu'ccn tho plalcsaud groups of -35 tu hos, and Vertical passagos l'or downwardly flowing currents of liquid lictu'ccn adjaccnt platcs.

2. The combination, in an (Waporating nin, the latter coinprising an uppcr and a lower compartmont, of heating: ,moans hotwccn said compartment comprising a plurality of healing tuhcs, arranged to ho sulmicrgcd by the liquid in the o *aporating pan, said tuhss hoing arranged in groups, 5 said groups extending horizontally across the pan and suppmtcd at thcir ends on opposite walls of the pan and scparatcd-chy Vertical spaces, the tuhcs in cach group boing disposed in superposed relation to each other,

considerable, force -rality of heating liulrcs, arranged to he spaccs and all'ording passages and upright plates located in the spaces hctwecnsaid groups and arranged to ailord passages for upwardly flowing currents oi' liquid hot-Ween the plates and said groups of tubes and other passages for downwardly flowin currents of liquid hctwccn the plates 3. 'lhc comhinalion, in an cvaporating pan, the lattcr comprising an uppcr and a lower compartment, of hosting: means hetwccn said compartment comprising a plusol)- incrgcd by the liquid in tho cyaporating pan, said tubes ltcing arranged in groups, said groups cxlcndiug horizontally across the pan and supporlcd at their ends on opposilc walls oi the an and sepa ated h; vcrlloal spaces,

the to ?es in each group hcing disposcd in superposed relation to each other, upright plates located in thc spaccs hclzween said groups and arrangcd to all'ord passages for upwardly flowing currents of liquid hc'rwcen thoplales and said groups of tuhcs and other passages for downwardly lowing currents of liquid hotwccn thc plates, and steam chcsts exterior to the walls which support the tubes communicating with said tuhcs.

4." The comhimition with an evaporating pan having an upper compartment and a lower coinpz'irtmont, of horizontal healing tubes located hctwccn said upper and lows-r compartments, and separated hy Vertically extending spaccs and vertical plnlcs locaicd in tho said er tically extcuding spaces, said plates extend in: a substantial distance holow tho loracrmost of said 'l'uhcs into the said lou'cr compartmcnt.

5. Tho co1nl:inati 11, in an oyap pan, of liquid hunting moons locatcd n lower cud of tho pan comprising a pin of hoaling luhcs cxionding horiyzoi A hctwccn two opi iosing Walls ol" the pan. and supportcd a!" thcir cuds at said Walls, said groups hcing; scparalcd hy vcrlical spoons, a plurality oi u n'ight plates located i1 said for n i'r-rz'irdly flowing currcnl's of lio uid lvclu'ccn tho platcs and groups of tuncs and vertical passages for downwardly llowing currcnl's of liquid h twccn adjaccnt plates, and means for supporting said platcs on said tuhcs.

in testimony, that I claim the forcgoing as my invcntion l allix my signature in tho prescncc of two witncsscs, this 12th day oi March, A. 1)., 1907.

PA I ll 1 HTSTAV RA lSF li.

W'itnessos:

C. ()mnnncs POOLE, A. M. Bonn.

arranged in groups 

